Pitometer



W. S. 'DARLEY Feb. 2?, 1923.

PITOMETER Fi led Jan.

Patented leb. 2?, 123523.

W S. DARLEY, 01 CEXCAGO, ELLINOIS.

PTOIVLETER.

J specitica tion.

My intention reiatcs to improvements in pitor rs especially adapted tor ineasuii.' ino' and determining; thi,` velocity oi flow otliquids in pipes, and has tor its obiit the provision oi" an improved cons ruction et this cnarai'ftcr which is smple and eiiiN cient in use, and capable ot' economical man-- ntacture. p

Other objects will apaear hereinafter.

The inve `tion consists in thecoinbinations and arrangements ot parts hereinafter described and claimed.

The invention will be best understood by ret'erence to the accompanying; drawings forming` a part of this specification, and in which,

Fig. 1, is a view showing a pitome'ier enibodyinp; the invention in position ot use,

Fig'. 2, an enlarged section taken through the end or a current-testing' or Pitots tube employed in the construction, and f Fig. 3, a detail View of one oi' a plurality ol pinch. coelrs employed in the construction. l

The preferred form ot construction, as illustrated in the drawings, comprises a casing i. provided at its lower end with a tapered threaded socket 5 adapted to 'lit the taper thread on the nipple 6 ot an ordinary corporation cock 7 adapted and are ranged to be secured in the side of the water main 8, as iinlicated. The corporation cock is proif'ided with a rotatable coreinen'iber Si, having a diametric perforation. therein, adapted to permit the readypassage ot a current-testing or Pitots tube 10, as indicated. The arrangement is such, that a small chamber is formed in the casing d behind the end ol the nipple 6, and the bore or opening extending through the corporation cock is somewhat larger than the outside diameter ot the tube 10, whereby said chamber is placed in open communication with the interior ot the pipe S through and at the periphery thereof, and whereby the static pressure in the pipe 8 will be 'Freely transmitted into said chamber without coniplication from the vdow ot current in the pipe 8. At its upper end, the casing` l carries a threaded cap 11 and a rubber gasket l2 is imprisoned therein,` as shown, and whereby the tube 10 may be freely slid through thecasing il and corporation cock 'i' and loclred in. adjusted position, andthe joint sealed to prevent the escape ot water. fit its inner end, the tube 10 is closed by ,a plug 13 and is provided with a current opening '14- in one side thereof, an indicator 15 being termed on the upper end of said tube in registration with theopening 14 so as to indicate the position ot the latter when concealed within the pipe and 'facilitate the adjustment ot said tube withv the opening 14': at substantially the center ot the pipe 8 and directly exposed to the action of the flow or current therein. hollow or tubular valve stein 16 is detachably connected with the upper end of the tube 10, said valve stein beingprovided with a conical valve head 17 seatingin a conical Valve seat at the upper end of said tube, las best shown in Fig. 2. The valve stem loris detachably rand adjustably secured in place by means ot a coupling 18 swiveled on said valve stem behind said valve head and threaded to the upper end of said tube, as shown. A rubber tube or hose 1.9 is secured to the valve stem '16 and is provided with a branch 20 connected with one limby 21 ot a glass lil-tube, as shown. this arrangement, it will be observed that the hose or tube 19 may be readily detached it desired, or loosened, so as to prevent the twisting' thereot during; connection 'ot the casing it with the corporation cock 7. rlihe .ll-tube is lilled with a distinctively colored liquid 22, oi? known speciic `gravity heaver than water or the liquid flowing' in the pipe 8, and which will not readily mix with water,and pinch cocks 23 are arranged on the tube 19 on opposite sides of the branch 20, as shown. rllhe other limb @tot the U-tube is connected by a branch 25 with another rubber .hose or tube 2G, leading to a nipple 2T having a passage 28 extending` therethrough, and thence downwardly into theV top of the chamber within the casing fi, pinch cocks 23 being provided on tube QG on opposite sides ot the branch 25, as indicated. The tube 2G is connected with the nipple 27 which extends laterally from the side ol casing et by means ot :i valve stern 16, valve head 17 and coupling 18, just as the tube 19 is secured to the tube 10.

In use, the parts are connected as shown, and all tubes filled with Water from the pipe 8 by n'ianipulating the 'pinch cocks 23, Whereupon the outer pinch cocks are closed'. By this arrangement one limb 24 of the U.- tube will be subjected to the action of the static pressure in the pipe 8,A and the other limb 21 thereof Will be subjected to the static pressure, and, in addition thereto, to the eli'ect of the flow or velocity of any current Within the' pipe 8, which will necessarily lorce the level of the liquid 22 downwardly in the limb 21 and up\\i'ardly inthe linibil. 'Ehe diflleiencefin level between the liquid inthe limbs ofthe Utube is tlienmeasured, and constitutesV a means for calculating the velocity of iiow of' the current in pipe 8, ay suitable co-ellicientf'or the orifice 111 being determined by eirperimenty and a proper coeflicient for the pipe y8 being assumed; 1n this Way, the velocity ofb How, and other features relatingl thereto, may be readily determined, as iv-il be readily understood by those skilled inthis art'.

Vhile l have illustrated and described thev preferred form of construction for carrying my. invention into effect, this is capable of variation and modification Without dey parting from the spirit of the invention. l, therefore, do not WishV to be limited to the precise details'of construction set fortln'but desire` to avail myself of such variations and modifications as come Within the scope ofthe appended claims.

Having described' my' invention, what l claimy as vnew and desire to secureA by Letters Patent isi'- f 1.' The combination With'a pipe, of a co1- poration cockleading thereinto; a casing provided with means for securing the same to saidi corporationcock andl With an internal chamber arranged and adaptedl to be placed'l in open communication with the :interior of said pipe upon opening` of said cock; alateral extensionon said casinO';

Said extension beingprovided with a pas` sage leading from said chamber; a currentery thereof; a casingthreaded to the outer said casing, chamber, and corporation cock, said tube being closed vat its inner end and provided With a current opening; an indicator on the outer ,n

end of said tube indicating the position of said current opening; a laterally extending threaded nipple on said casing surrounding the passage leading from said chamber, said nipple being provided with a valve seat at the outer end of said passage; a Vperforated valve stem having a head yadapted and arranged to seat on said valve seat; a coupling threaded on said nipple andsvviveledon-said valve stein, and. arranged toforce said valve head to itsseat; a U-tube; a hose connected With said valve stem and With one limb of said Uftube; and a hose connected with the other limbvof said U-tube and with the outer end of said current-testing tube sulgistantially as described. p f y 3. The combination with a pipe,vof av cor.-

l'poration cock leading through the periphery thereof; a casing secured-toi the.V outer endof said Vcorporation cock, saldi casing/being provided with an internal chamber arranged the interior ofsaid pipe .upon `openingof said corporation cock, and there being a laterally extending passage lleading from said chamber out through a side of said casing; a current-testing tube slidable through said casing,chamber and corporation cock, said tube being closed at its inner end and provided with aA current-opening'5 ai laterally extending nipple on said casing surrounding to be thrown into open communication with the passage leading from said chamber; a f l U-tube; a hose connecting one limb of said U-tube WithA said nipple; and a--hosey connecting the other limb of saidv U`tube`with the outer end of said current-testing tube, sub-V stantially as described. l

In testimony whereof l have signed my naine to this specification in the presence of tWo subscribing Witnesses;

WILLIAM Dinner.

Viitnesses: f Y

JosHUA lt. H. Po'rrs, B. Gr. RIoirARns.` 

